Display device having a sensing controller for controlling the driving of an input sensing layer

Abstract

A display device includes a display panel that displays an image, an input sensor that senses an external input, and a sensing controller that controls the driving of the input sensor. The input sensor includes a plurality of scanning electrodes and a plurality of sensing electrodes. The sensing controller simultaneously transmits input scanning signals to at least two scanning electrodes of the plurality of scanning electrodes during a group scanning period. The group scanning period includes a plurality of scanning periods. The sensing controller transmits a compensating signal having a phase different from a phase of at least one of the input scanning signals to at least one sensing electrode of the plurality of sensing electrodes during at least one scanning period of the plurality of scanning periods.

What is claimed is: 
     
       1. A display device comprising:
 a display panel that displays an image; 
 an input sensor disposed on the display panel, the input sensor sensing an external input; and 
 a controller that controls driving of the input sensor, wherein 
 the input sensor includes:
 a plurality of scanning electrodes arranged in a first direction and extended in a second direction crossing the first direction; and 
 a plurality of sensing electrodes arranged in the second direction and extended in the first direction, wherein the plurality of sensing electrodes are electrically insulated from and cross the plurality of scanning electrodes, 
 
 the controller simultaneously transmits input scanning signals to at least two scanning electrodes of the plurality of scanning electrodes during a group scanning period, 
 the group scanning period includes a plurality of scanning periods, and 
 the controller transmits a compensating signal to at least one sensing electrode of the plurality of sensing electrodes during at least one scanning period of the plurality of scanning periods, and 
 the compensating signal has a phase different from a phase of at least one of the input scanning signals applied to at least one of the scanning electrodes. 
 
     
     
       2. The display device of  claim 1 , wherein
 the at least one of the input scanning signals includes:
 a first phase scanning signal having a first phase, and 
 a second phase scanning signal having a second phase reverse to the first phase, the at least two scanning electrodes include:
 ‘k’ number of first phase scanning electrodes receiving the first phase scanning signal during the at least one scanning period; and 
 ‘j’ number of second phase scanning electrodes receiving the second phase scanning signal during the at least one scanning period, 
 
 
 the first phase is reverse to the second phase, and 
 the ‘k’ and the ‘j’ are natural numbers equal to or greater than 1, and are different numbers from each other. 
 
     
     
       3. The display device of  claim 2 , wherein the compensating signal has the second phase during the at least one scanning period in case that the ‘k’ is greater than the ‘j’. 
     
     
       4. The display device of  claim 3 , wherein
 the compensating signal is applied to ‘i’ number of sensing electrodes of the plurality of sensing electrodes, in case that a value of the compensating signal is 1/h times of a value of the first phase scanning signal, and 
 the ‘i’ satisfies following Equation 1,
     i=h ×( k−j ).  Equation 1
 
 
 
     
     
       5. The display device of  claim 2 , wherein the compensating signal has the first phase during the at least one scanning period in case that the ‘k’ is less than the ‘j’. 
     
     
       6. The display device of  claim 5 , wherein
 the compensating signal is applied to ‘i’ number of sensing electrodes of the plurality of sensing electrodes, in case that a value of the compensating signal is 1/h times of a value of the first phase scanning signal, and 
 the ‘i’ satisfies following Equation 2,
     i=h ×( j−k ).  Equation 2
 
 
 
     
     
       7. The display device of  claim 1 , wherein
 the controller simultaneously transmits the input scanning signals to a first scanning electrode and a second scanning electrode during the group scanning period, 
 the plurality of scanning periods include a first scanning period and a second scanning period, 
 the first scanning electrode and the second scanning electrode receive a first phase scanning signal having a first phase during the first scanning period, 
 the first scanning electrode receives the first phase scanning signal, and the second scanning electrode receives a second phase scanning signal having a second phase during the second scanning period, and 
 the first phase is reverse to the second phase. 
 
     
     
       8. The display device of  claim 7 , wherein the controller transmits the compensating signal to the at least one sensing electrode during the first scanning period. 
     
     
       9. The display device of  claim 8 , wherein the compensating signal has the second phase during the first scanning period. 
     
     
       10. The display device of  claim 8 , wherein the controller does not transmit the compensating signal to the plurality of sensing electrodes during the second scanning period. 
     
     
       11. The display device of  claim 1 , wherein the controller transmits a sensing signal of the input scanning signals to remaining sensing electrodes of the plurality of sensing electrodes except for the at least one sensing electrode receiving the compensating signal. 
     
     
       12. The display device of  claim 11 , wherein the controller:
 transmits the compensating signal to the at least one sensing electrode of the plurality of sensing electrodes; 
 applies a ground voltage to sensing electrodes adjacent to the at least one sensing electrode of the plurality of sensing electrodes; and 
 transmits the sensing signal to remaining sensing electrodes of the plurality of sensing electrodes except for the at least one sensing electrodes and the sensing electrodes adjacent to the at least one sensing electrode. 
 
     
     
       13. The display device of  claim 11 , wherein the controller:
 transmits the compensating signal to the at least one sensing electrode of the plurality of sensing electrodes; 
 maintains, in a floating state, sensing electrodes adjacent to the at least one sensing electrode of the plurality of sensing electrodes; and 
 transmits the sensing signal to remaining sensing electrodes of the plurality of sensing electrodes except for the at least one sensing electrodes and the sensing electrodes adjacent to the at least one sensing electrode. 
 
     
     
       14. The display device of  claim 1 , wherein the controller:
 senses the external input during a first sensing frame and a second sensing frame; 
 transmits the compensating signal to a first sensing electrode of the plurality of sensing electrodes during the first sensing frame; and 
 transmits the compensating signal to a second sensing electrode of the plurality of sensing electrodes during the second sensing frame. 
 
     
     
       15. The display device of  claim 1 , wherein the display panel includes:
 a display element layer including a light emitting element; and 
 an encapsulating layer disposed on the display element layer. 
 
     
     
       16. The display device of  claim 15 , wherein the input sensor is disposed directly on the encapsulating layer. 
     
     
       17. The display device of  claim 1 , further comprising:
 an adhesive film disposed on the display panel and the input sensor. 
 
     
     
       18. A display device comprising:
 a display panel that displays an image; 
 an input sensor disposed on the display panel, the input sensor that detects an external input; and 
 a controller that controls driving of the input sensor, wherein 
 the input sensor includes:
 a plurality of scanning electrodes arranged in a first direction and extended in a second direction crossing the first direction; and 
 a plurality of sensing electrodes arranged in the second direction and extended in the first direction, herein the plurality of sensing electrodes are electrically insulated from and cross the plurality of scanning electrodes, and 
 
 the controller transmits input scanning signals to the plurality of scanning electrodes to sense the external input, and transmits a compensating signal to at least one sensing electrode of the plurality of sensing electrodes, and 
 the compensating signal has a phase different from a phase of at least one of the input scanning signals applied to at least one of the scanning electrodes. 
 
     
     
       19. The display device of  claim 18 , wherein
 the phase of the compensating signal is reverse to each of the phases of the input scanning signals, 
 the input sensor detects the external input during a first sensing frame and a second sensing frame, and 
 the controller transmits the compensating signal to a first sensing electrode of the plurality of sensing electrodes during the first sensing frame, and transmits the compensating signal to a second sensing electrode of the plurality of sensing electrodes during the second sensing frame. 
 
     
     
       20. The display device of  claim 18 , wherein the controller transmits a sensing signal of the input scanning signals to remaining sensing electrodes of the plurality of sensing electrodes except for the at least one sensing electrode receiving the compensating signal. 
     
     
       21. The display device of  claim 20 , wherein
 the plurality of scanning electrodes include ‘x’ number of first electrodes, 
 the plurality of sensing electrodes include ‘y’ number of second electrodes, and 
 the ‘x’ and the ‘y’ are natural numbers equal to or greater than 1, and are an equal number or different numbers from each other. 
 
     
     
       22. The display device of  claim 21 , wherein the controller sequentially transmits the input scanning signals to the ‘x’ number of scanning electrodes. 
     
     
       23. The display device of  claim 1 , wherein the controller applies one of a ground voltage or a floating state to sensing electrodes immediately adjacent to the at least one sensing electrode of the plurality of sensing electrodes.